Improvement in planing-machines



JOHN GRlFFEN.

Patented Marchl9, i872- \ILT FIGS

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Improvement in PlaningMa'chi'nes. No.124,813.

WITNESSES{% JOHN GRIFFEN, OF PHCENIXVILLE, PENNSYLVANIA, ASSIGNOR TO PHCENIX IRON COMPANY.

lMPROt'EMEN-"l' IN PLANlNG-MACHINES.

Specification forming part of Letters Patent No. 124,813, dated March 19, 1872.

Specification describing an Improvement in Planing-Machines, invented by JOHN GRIF- FEN, of Phoenixville, Chester county, Pennsylvania. v

My invention consists of a planing'machine in which the horizontal slide is controlled by a guide on the traversing-bed of the machine,

substantially in the manner described hereafter, so that regularly or irregularly-curved objects, or objects partly curved and partly straight, may be planed with cuts in a line corresponding with the shape of the object.

Figure 1 is a side view of my improved planing-machine; Fig. 2, a plan view; and Fig.3,

an end view. r

A is the foundation or frame of the machine, and B the bed, which is caused to slide to and fro on guiding-ways on the frame by any of the tool-box J is pivoted in the usual manner.

My invention is, in the present instance,applied to the planing of the inclined surface of a segment, X, forming part of the circular track for the anti-friction rollers of a turn-table, but the improvement may be applied to the planing of different curved shapes, as will appear hereafter. The horizontal movement of the slide F is under the control of a segment al guide, K, secured to the traversing bed 13,

and having a slot, 00, formed on the arc of a circle, of the same radius as. that of the segment X to be planed. The guide and the segment are placed side by side on the bed B, and are adjusted, in respect to each other, in the manner clearly shown in the-drawin g. To the slide F is'secured an arm, M, furnished at the outer end with a vibrating block, a, which fits snugly, but so as to slide freely in the slot as.

The center of this block and the point of the corresponding distance ahead in the direction of the arrow, Fig. 2, so that the said guide and tool may occupy the same relative positions in respect to the slot as and work. As the bed of the machine traverses, the slide F being controlled by the slot w, the cut made by the tool must necessarily be in the arc of a circle, corresponding to the curve of the slot :0 and having the same center as the segment X. As a surface inclined transversely has, in the present instance, to be planed on the segment, the guide-plate G is adjusted 011 the slide F at a corresponding inclination, and the slide H is moved on the guide-plate by turning a screw, a, adapted to a nut in the said slide H, and to bearings on the guide, so as to impart from time to time the proper feed to the cuttin g-tool.

Although I have described my invention as applied to the planing of a segment, it will be evident that other-shaped obj ects,having-regular or irregular curves, or partly straight and partly curved, may be planed byrnaking the guidingslot, which controls the slide F, of a corresponding shape.

I claim as my invention- A planing-machine, in which a guide en the bed is combined with the horizontalslide, substantially in the manner and for the purpose specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' JOHN GRIFFEN. Witnesses:

WM. .A. STEEL, J. B. HARDING. 

